We are able to collect large quantity of leads and, with using lean processing, can extract the quality leads, thus allowing us to maintain a less than 1% vacancy rate.Craigslist is important to stand out due to the large number of scams and unreliable posts, but for Zillow and other reputable platforms, this isn't the case. 

Quality over quantity. 

I have a 3bd 2ba very clean cul-de-sac house in Harmony Crossing in Fort Collins that has been VACANT for 4 months, priced very competitively. ~1-2 showings a weekend, but there is a lot of competition out there since mid summer...

You will find that quantity isn't necessarily quality with these groups, but you will be able to tell which ones are good after your first meeting. 

As for the quantity, as I said above, it really depends on your budget and availability to answer the calls.

You can make an excel sheet really easily having each row multiply quantity by unit price.

Quantity will make a difference.

Some areas have lower profit margins but are a guarantee, while others are a lot harder to find quantity, but it will only take 1 deal to net over $500k in profit in flip or allow you to collect a decent rent.B&H in some areas are a waste of time because the tenant pool is not the best or your have rent control issues, but there are quite a few places where renters are stabilized former homeowners that were displaced from the crash and they will pay well for the right house and not move for a while.

Every wall in the apartment has a high quantity of minor damage (30+ nails in a single wall, gouges in the paint that goes to the sheetrock, etc.).

@Mitch LarriveeDepending on how many people want to give you money and the quantities you may have a major issue with the SEC.